Centrifugal pump



Jan. 1 1924. 1,479,777

w. HEBARD CENTRIFUGAL PUMP Filed Jan. 5, 1922 2 sheets-sheet 1 lwuewlioz w, /%zm W. HEBARD CENTRIFUGAL PUMP Jan. 1 1924. 1,479,777

Filed Jan. 5, 1922 2 Sheets-Sheet 2 3 vwewtoz iatenteitl den. ll, 1%24.

WILLI BARB, 0F WINNEMUCCA, NEVADA.

cnn'rnrruenn rum.

Application filed. January 3, 1922.

To all whom it may concern:

Be it known that 1, WILLIAM HnBARn, a citizen of the United States, residing at Winnemucca, in the county of Humboldt and State of Nevada, have invented new and useful Improvements in Centrifugal Pumps, of which the following is a specification.

, Jlhis invention relates to water pumps for the circulation systems of internal combustion engines, and particularly to an auxiliary pump which may be readily intercalated in a system which is normally thermosiphonic, in order to increase the rapidity of flow of the cooling medium therethrough.

and, in consequence, to enhance the cooling eficiency of the radiator forming a part of said system.

Qne of the objects of the invention is to provide a circulation pump as an integral part of the upper hose connection which 13 usually bolted to the forward part of the cylinder head, and connects with the hose leading to the radiator.

Another object of the invention is the provision in the cooling system of an internal combustion engine of a pump having a centrifugally functioning impeller, and a by-pass from the delivery to the. discharge conduits leading to and from said impeller, whereby thermo-siphonic movement of the cooling medium may continue without interruption should the impeller become stalled through slippage of the belt or through other causes.

Another object of the invention is the construction of a pump in which the discharge and delivery conduits are arranged within the casting in such manner as to ermit a minimum thickness of the casting, enabling it to be accommodated within the limited s ace between the engine block and cooling an.

Still another object of the invention is the construction by which the drive pulley for the pump surrounds the stuffing gland for the shaft of the pump impeller, whereby compactness of the device is secured and the drive pulley positioned in the planeof the fan pulley.

A still further object of the invention is the arrangement of the pump drivin means in operat1ve relation to the fan pul e and crank shaftp'ulley b means of a sing e belt passing around a 1 th being tightened relative to the driving ree elements, said belt the arm 9'supporting said fan p Serial No. 526,784.

accompanying drawings, described in the following specification, and particularly cla med, and In such variations and modificat1ons thereof as will be obvious to those .skilled in the art to which my invention re lates. In the drawings accompanying and form-' mg a part of this specification, and wherein the preferred embodiment of my invention is illustrated Figure 1 is a side elevation, more or less dlagrammatic in character, showing the coollng system of an automobile engine with my 1mproved centrifugal pump applied thereto.

Figure 2 is a front elevation of the pump.

Figure 3 is a sectional view taken along the line 3-3 of Figure 2.

F1gure 4 is a plan view of the device shown in Figure 2.

Figure 5* is a cross section through a drive pulley and part of the casing ofthe pump, part of the latter being broken away.

igure 6 is a cross section taken along the line 6-6 of Figure 5 showing the pump lmpeller.

Figure 7 is a front elevation, diagrammatlc in character, showing the relative position of the pump, fan pulley and crank shaft pulle in operative relation to an internal combustion engine.

Referring in detail to the several figures the numeral 1 represents the water jacketed cylinder block of an internal combustion engine, including the cylinder head 2 which is connected to the radlator 3 by means of the water conduits 4: and 5.

The cooling fan is represented at 7 which is mounted on a shaft 8 carried by an arm 9, the latter being swingablysupported upon a bolt 10 secured to the front-of the casing 11 formin part of the cylinder block of'the automobile engine.

The crank shaft 12 of the engine is provided with the driving pulley 13 connected to the fan pulley 14 by means of a belt 15,

through which said fan pulley is driven.

said belt For the purpose of tlghtenin ey may be swung upon the bolt 10 as a pivot and may be secured in any position of adjustment by tightening said bolt.

In the ordinary thermo-siphonic cooling system the conduit 4 includes an upper hose connection bolted to the water jacket of the cylinder head by means of bolts 6 which pass through apertures 37 and 38 in said hose connection as shown in Figure 2. Between the latter fitting and the radiator is clamped a piece of flexible hose 36. The space between the fan 7 and cylinder blockl is narrow, and heretofore, it has been customary, in the construction of an auxiliary pump for use in a thermo-siphonic cooling system to associate it with the hose connection 16 forming part of the conduit '5.' The use of a pump at this point, however, entails an excessively long drive shaft for the pump impeller and usually a support for the same, making a cumbersome and undesirable arrangement.

By my invention I replace the upper hose coupling with a substitute upper hose coupling 35 having the pump casing 17 cast integral therewith. This substitute coupling is provided with bolt holes 37 and 38 registering with the existing bolt holes in the cylinder head 2 and with an inlet conduit 31 communicating at one end with the water jacket of the cylinder head and extending upwardly at the other end, forming an outlet passage 18 similar in every respect to the corresponding outlet of the original hose connection so that no alteration in the structure into which it is intercalated is required, to-make the substitution of the pump of the present invention for the original part. The pump casing 17, referring now to Figures 2, 3 and 4 is offset, to one side of the flanged portion of the upper hose coupling 35 and is provided with a suction conduit 19 which opens into the central part of the chamber of said pump casing and communicates at its upper end with the conduit 31.

From the peripheral portion 23 of the chamber of the pump casing extends a delivery conduit 22which also communicates at its upper end with the conduit 21. A wmmon wall 32 separates the conduits 19 and 22 and terminates at the point where said conduits enter the conduit 31. A water impeller 21 is j ournalled within the pump casing 17 and, as shown in cross section in Figure 6, comprises radial arms, slightly curved in the direction of the propeller shaft 25, forming between them chambers with the central portions of which the inlet conduit 19 communicates. The suctionand delivery conduits constitute a by-pass by means of which water is diverted from the thermo-siphonic column ascending an /arr? system of the engine. While the device of my invention is primarily intended to normally circulate Water by means of the pump, yet should said forced circulation be impaired by slippage of the belt or blocking of the pump impeller through freezing or other causes, the thermo-siphonic circulation through the conduit 31 and discharge passage 18 will continue without impediment due to the presence of the idle pump parts, since the latter are located in the by-pass entirely out of the path of thermo-siphonic flow.

The impeller shaft 25 is carried in bearings 26 and 26' in the opposite sides of the pump casing and extends forwardly into the plane of the driving belt 15 where it is provided with a pulley 27, keyed thereto at 28, and further secured in place by means of the set screw 29. This pulley is in frictional engagement with the driving belt 15 which surrounds also i the crank shaft pulley 13 and the fan pulley 14 as shown in Figure 7.

The pulley 27 i deeply flanged forming a cup shaped depression in one side thereof in which is housed the stufling gland 30 by means of which the drive shaft 25 is packed against leakage.

It will be understood, particularly from Figures 3 and 4, that the conduits 18 and19 are flattened at that portion of their length which embraces the common wall 32, so that the aggregate thickness ofthe casing which encloses this portion of said conduits is not much in excess of the Width of the outer end of the outlet passage 18. By this construction, and by the disposition of the stuffing gland 30 within the flanged pulley 27 a compact construction of pump is realized which is readily accommodated in the restricted space between the fan and the engine cylinder block.

In the installation of my improved centrifugal pump, the same bolts are used as were utilized to hold in place the original upper hose connection. The fan belt is sufficiently long to pass around the crank shaft pulley andboth the pump and fan pulley as shown in Figure 7, and are tightened by swinging the arm 9, upon which the fan pulley is j ournalled, outwardly a ainst the belt as hereinbefore described. hould slippage of the belt occur, however, circulation of water through the cooling system will be continued thermo-siphonically through the passage 24 in the same manner as before the pump was installed.

Having described my invention what ll claim as new and desire to secure by Letters Patent, is: j

1. A. water circulating device for the cooling systems of automobile power plants,

v from the water jacket to the radiator of the consisting of a coupling adapted to be inautomobile throu h the conduit 31 in the hose coupling, said water being thereupon serted between the engine and radiator including a permanently open conduit aflordlllltl forcibly circulated through the circulation ing communication between the water space 1311 of the engine and the radiator to permit constant thermo-siphonic flow therethrough, said coupling being formed with a by-pass communicating at both end with said conduit, and a pump in said by-pass.

2. A water circulating device for the cooling systems of automobile power plants consisting of a coupling adapted to be inserted between the engine and radiator, including a permanently open conduit which afl'ords communication between the water space of the engine and the radiator, to permit constant thermo-siphonic flow therethrough,

said coupling being formed with a chamber oflf-set from said conduit and communicating therewith, a flat partition wall intersecting said chamber for a part of its length, forming a by-pass communicating with said conduit, and a pump in said by-pass.

In testimony whereof I have hereunto set my hand in presence. of two subscribing witnesses.

WILLIAM HEBARD, Witnesses:

THOS;*H. SHONE, CHAS. G. SMITH. 

